Brookfield DV1 Viscometer - Manual (Page 5)

Brookfield Engineering Laboratories, Inc. Page 5 Manual No. M14-023
I. INTRODUCTION
The Brookfield DV1 Viscometer series has provided exceptional value for viscometer users since its
introduction in 1981. Brookfield has continued to develop and improve the DV1 to maintain its position
in the market as the best value for Q/C applications. The Brookfield DV1 Viscometer continues in this
tradition of innovation, quality and value. The incorporation of a large graphical display and “Hot Keys”
has allowed for a new and improved user interface that preserves single speed data collection methods
(or multiple speeds when using Wingather SQ), which makes using the DV1 Viscometer easier than
ever before.
The Brookfield DV1 Viscometer measures fluid viscosity which is a measure of a fluid’s resistance to
flow. You will find a detailed description of the science of viscosity in the Brookfield publication “More
Solutions to Sticky Problems”, a copy of which was included with your DV1.
The principle of operation of the DV1 is to drive a spindle (which is immersed in the test fluid) through
a calibrated spring. The viscous drag of the fluid against the spindle is measured by the spring deflection.
Spring deflection is measured with a rotary transducer. This system provides continuous sensing and
display of the measurement during the entire test. The measurement range of a DV1 (in centipoise
or milliPascal-seconds) is determined by the rotational speed of the spindle, the size and shape of the
spindle, the container the spindle is rotating in, and the full-scale torque of the calibrated spring.
There are four basic spring torque series offered by Brookfield:
Spring Torque
Model dyne•cm milli Newton•m
DV1MLV 673.7 0.0673
DV1MRV 7,187.0 0.7187
DV1MHA 14,374.0 1.4374
DV1MHB 57,496.0 5.7496
The higher the torque calibration, the higher the measurement range. The viscosity measurement range
for each torque calibration may be found in Appendix B.
The DV1 is configured to accept an optional temperature probe, which allows temperature readout over
the range -100°C to +300°C (-148°F to + 572°F). This option allows ambient temperature measurement
or temperature measurement of the sample during viscosity testing. Contact Brookfield or your local
Brookfield dealer for more information on this instrument option.
All units of measurement are displayed according to either the CGS system or the SI system.
1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown as
mPa•s) on the DV1 Viscometer display.
2. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%”)
in both cases) on the DV1 Viscometer display.
Tp 3. Temperature appears in units of Celsius (shown as C) or Fahrenheit (shown as F) on the
DV1 Viscometer display.
The following applies to DV1 Viscometers when using an optional temperature probe. Look for the
symbol Tp throughout this manual for instructions pertaining specifically to DV1 Viscometers with
temperature probe option.